 By 1672, Barthélemy had joined François de Salignac de la Mothe-Fénelon and Claude Trouvé in a mission to the Iroquois on the north shore of Lake Ontario.Because of difficulties, this mission was abandoned after the death of François de Salignac.Michel went to the Iroquois mission of La Montagne for a short time and replaced Father Bailly as school-master.